<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 👩
        var arr = [{ label: '男', value: 1 }, { label: '女', value: 0 }]

        function f(arr) {
            // 1.声明一个空对象
            let a = {}
            for (let i = 0; i < arr.length; i++) {
                // 2.对象属性赋值
                a[arr[i].value] = arr[i].label
            }
            return a
        }
        
        var obj = f(arr);
        console.log(obj)
        // obj= {'1': '男'， '0': '女'}
    </script>
</body>

</html>